一箇所排水時の排水立て管内平均圧力分布の予測手法 : 超高層住宅における排水立て管内圧力分布に関する研究その1

概要

論文の詳細を見る
Systematic full scale model experiments were performed using a 100m class experiment tower in order to simulate actual water discharge of high-rise residential buildings. Preliminary experiments showed that high level of discharge entry leads not only large peak negative pressure but also peak position being apart from the branch entry, which has not been observed in the 30m class tower experiments. ln order to develop a numerical prediction method of pressure distribution, the drainage stack system is hypothetically divided into four parts and each part is separatively modeled. A new semi-empirical hydraulic model is developed to relate constant pressure gradient at final stack length to stack air flow rate, based on the balance of pressure and frictional forces. Distance between discharge entry and a downstream point of the same recovered air pressure is successfuly modeled as a function of stack air flow rate. Other carts of the drainage stack systems are handled based on the empirically determined friction loss coefficients. Finally, we assembled each model and formed a full numerical prediction method of air pressure distribution of drainage stack systems, which includes prediction of peak negative pressure and stack air flow rate. The calculated results are satisfactory compared to both 108m tower and 30m tower experiments, in case of single-point steady discharge.
社団法人日本建築学会の論文
1996-03-30